GameStop has announced that customers who preorder Madden NFL 10 will have their premature enthusiasm rewarded with an "exclusive" 20 minute demo of the new game, which recreates Super Bowl XLIII with the champion Pittsburgh Steelers vs. the Arizona Cardinals. But if you happen to have a blood oath against reserving games at certain establishments, fret not -- EA will also release a far less awesome 8 minute Madden NFL 10 demo, featuring the New York Giants vs. the Dallas Cowboys.

While the initial announcement of the exclusive GameStop demo at first seemed to suggest it would be the only way for gamers to try out this year"s version of Madden, EA quickly clarified the confusion, telling Shacknews that "we will also be issuing a demo via Xbox LIVE and PSN that features the Giants vs. Cowboys with 2 minute quarters" (whereas the GameStop demo features 5 minute quarters). Both demos are only for the Xbox 360 and PlayStation 3 versions of the game, with those reserving through GameStop getting a special download code for their version of the demo.

The GameStop demo is expected to go live by "the end of July," while a timeframe for the public demo hasn"t been announced. Madden NFL 10 is set for release on August 14.